{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"EM","section_name":"Engine Mechanical","page":2,"pages_in_section":64,"title":"Troubleshooting","section_header":"Engine Mechanical — Troubleshooting","ocr_text":"TROUBLESHOOTING\n\nProblem | Possible cause | Remedy | Page\n\nEngine overheats | Cooling system faulty | Troubleshoot cooling system | CO-2\n | Incorrect ignition timing | Reset timing | IG-10\n\nEngine will not crank or cranks slowly | Starting system faulty | Troubleshoot starting system | ST-2\n\nEngine will not start/ Hard to start (cranks OK) | Vacuum leaks\n• PCV hoses\n• EGR valve\n• Intake manifold\n• Air intake chamber\n• Throttle body\n• ISC valve | Repair as necessary |\n\n | Pulling in air between air flow meter and throttle body | Repair as necessary | FI-58, 63\n\n | Ignition problems\n• Ignition coil\n• Igniter\n• Distributor | Perform spark test | IG-4\n\n | Ignition wiring disconnected or broken | Inspect wiring |\n\n | No fuel supply to injector\n• No fuel in tank\n• Fuel pump not working\n• Fuel filter clogged\n• Fuel line clogged or leaking | Troubleshoot EFI system | FI-8\n\n | EFI system problems | Repair as necessary |\n\n | ISC system problem | Check ISC system | FI-60\n\n | Spark plugs faulty | Inspect spark plugs | IG-5\n\n | Low compression | Check compression | EM-6\n\nRough idle, stalls or misses | Vacuum leaks\n• PCV hoses\n• EGR valve\n• Intake manifold\n• Air intake chamber\n• Throttle body\n• ISC valve | Repair as necessary |\n\n | Pulling in air between air flow meter and throttle body | | FI-58, 63\n\n | Incorrect idle speed | Check ISC system | FI-60\n\n | Incorrect ignition timing | Reset timing | IG-10\n\n | Ignition problems\n• Ignition coil\n• Igniter\n• Distributor | Perform spark test\nInspect coil\nInspect distributor | IG-4\n\n | Ignition wiring faulty | Inspect wiring |\n\n | EFI system problems | Repair as necessary |\n\n | Spark plugs faulty | Inspect plugs |\n\n | Engine overheats | Check cooling system | CO-2\n\n | Low compression | Check compression | 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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}